Viewing Media Description instead of Post Excerpt

Im in carousel-horizontal-posts-content-slider.php
I see

$post_title = $post->post_title;
		$post_link =  get_permalink($post->ID);
		$post_content = $post->post_content;
		$displaydesc= $word_imit;

		$slider_gallery.= '<div id="foo_content">';

		if($displayimage=="YES"){

			 if (has_post_thumbnail( $post->ID ) ):
			$image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'single-post-thumbnail' );
			endif; 

			$featured_img = "<img width='115' height='115' src='". $image[0] . "' " . $attributes . " />";

			$slider_gallery.= '<a href="'.$post_link.'">'.$featured_img.'</a>';
		}

		$slider_gallery.= '<h2>'.$post_title.'</h2>';
		$slider_gallery.= '<p><span class="foo_con">'.tchpcs_clean($post_content, $displaydesc).'</span></p>';

		$slider_gallery.= '';
		$slider_gallery.= '</div>';

	}

	$slider_gallery.='</div>';
	$slider_gallery.='<div class="clearfix"></div>';
	$slider_gallery.='<a class="prev" id="foo1_prev" href="#"><span>prev</span></a>';
	$slider_gallery.='<a class="next" id="foo1_next" href="#"><span>next</span></a>';
	$slider_gallery.='</div>';

(already removed read more)

How do I make the media description (which is HTML & perfect for what I need) viewable instead of the post excerpt?

Thanks

https://www.ads-software.com/extend/plugins/carousel-horizontal-posts-content-slider/